The North American F107 was a fighter-bomber prototype that was intended to fill a Mach-2 requirement.
Loosely based on the F-100, it never saw service, though it seems it delivered on its performance and
was a useful test bed. Ultimately it was flown-off against the F105, to which it lost and the project was cut.

One of 3 YF-107 prototypes, this one at the Pima Museum, Tucson AZ

Another YF-107 prototype, this one at the USAF Museum, Dayton OH (Oct 2004)